Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2317-1)
High Nessus Plugin ID 77236
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionEric W. Biederman discovered a flaw with the mediation of mount flags in the Linux kernel's user namespace subsystem. An unprivileged user could exploit this flaw to by-pass mount restrictions, and potentially gain administrative privileges. (CVE-2014-5207)
Kenton Varda discovered a flaw with read-only bind mounds when used with user namespaces. An unprivileged local user could exploit this flaw to gain full write privileges to a mount that should be read only. (CVE-2014-5206).
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected linux-image-3.13-generic and / or linux-image-3.13-generic-lpae packages.